Piezoelectric device



FIG. 1 is a front view of a piezoelectric device embodying our new design, the rear view being a mirror image thereof;

FIG. 2 is a left side view thereof, the right side view being a mirror image thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a perspective view thereof. 

The ornamental design for a piezoelectric device, as shown and described. 